Federally (US) mandated minimum warranty for emissions

[John Larson]

Having dealt professionally with emissions systems and catalytic converters
since their inception, and being in the position of having to replace
several per month, it has been quite evident to me over the long run that
rich running is the primary cause of premature converter failure.  If you
ask any experienced exhaust tech or smog tech about it, I believe you'll get
the same answer.  A rich condition will make that converter literally glow
cherry red, and the monolith melts and disintegrates.  John
----- Original Message ----- 
From: "Scott Hinckley" <audi at thehinckleys.com>
To: "John Larson" <j.d.larson at verizon.net>
Cc: <eric_audi.ql at mindspring.com>; <quattro at audifans.com>
Sent: Sunday, January 18, 2004 7:26 PM
Subject: Re: Federally (US) mandated minimum warranty for emissions


> At 12:45 PM 1/17/2004, John Larson wrote:
> > >although the part causing the problem may be.  If it's falling apart
inside,
> > >the mandated warranty probably won't cover it, because the breakup of
the
> > >monolith is nearly always caused by a rich condition (MAF, O2 sensor,
CTS,
>
> I believe that may be a LEAN condition, as that causes very hot exhaust.
> That is how I cooked the cat on my 1986 GTI.
> Scott
>
>
>